Custom mouthguard



FIG. 1 is a perspective view of a custom mouthguard showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a first side view thereof; and,

FIG. 7 is a second, opposing, side view thereof.

In the drawings, the broken lines in FIGS. 1-7 depict portions of the design that form no part of claim. 

The ornamental design for a custom mouthguard, as shown and described. 